The effect of powder type on the setting time and self compactability of mortar

Khaleel, O.R. and Razak, Hashim Abdul (2012) The effect of powder type on the setting time and self compactability of mortar. Construction and Building Materials, 36. pp. 20-26. ISSN 0950-0618, DOI

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In this paper, fly ash and metakaolin as pozzolan while limestone powder and kaolin as filler material were used at replacement levels of 5, 10, 15, and 20 by weight of cement and sand, respectively. The effects of these powders on the fresh property of mortar mixes were studied and reported. Superplasticizer dosages were determined from flow test on cement paste and mortar with different powder content. A total of 33 mixes were prepared, mixed, and tested. The mini slump cone and mini V-funnel box tests were used to assess the flowability of the fresh mortar. In addition, the effect of mineral admixture on setting time of the mixes was also evaluated. In this study, the optimum dosage of superplasticizer was determined based on the desired flowability for self compactability. Superplasticizer at higher dosages than optimum reduced the stability due to bleeding. The results confirmed the role of the mineral powders in determining the desired stability and the flowability of mortar mixes which is crucial for self compacting concrete. © 2012 Elsevier Ltd. All rights reserved.

Item Type: Article
Additional Information: 028DV Times Cited:1 Cited References Count:21
Uncontrolled Keywords: Mineral powder type, Self compactability, Superplasticizer dosages, Cement paste, Filler materials, Flow tests, Flowability, Fresh properties, Limestone powder, Metakaolins, Mineral admixtures, Mineral powders, Mortar mixes, Replacement level, Setting time, Superplasticizers, Compressive strength, Fly ash, Kaolin, Minerals, Powders, Pozzolan, Self compacting concrete, Mortar
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering
Depositing User: Mr Jenal S
Date Deposited: 24 Jan 2014 14:48
Last Modified: 07 Aug 2019 09:06

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